Data taken from the last 50 years shows a clear correlation between shark attacks and the lunar phase, the researchers said.
Jack Shaw and his friend were neck-deep in water when the shark attacked.
A surfer narrowly escaped death after surviving a shark attack in California's Bodega Bay.
The 15-year-old boy was attacked by what is believed to have been a 500-pound bull shark in shallow water off the coast of the Florida Keys.
"It doesn't feel anything like what you would think," the victim of the attack, Lucas Cruz, said. "I thought I got hit by a boat."
Timothy Thompson's pregnant wife has paid tribute to the Australian surfer and father-to-be, who was killed by a great white shark on Sunday.
There have been at least 80 or so types of sharks reported in the coastal waters of the Atlantic and Pacific regions in the U.S. These are the most dangerous.
"Suddenly, he saw the man struggling. There was a lot of blood in the water," said a witness of the shark attack.
"Fatal shark attacks are rare today and the chances of discovering an archaeological case are incredibly small," explained researcher J. Alyssa White.
The incident is Australia's first fatal shark attack in 2021, after a record eight were seen in 2020 in the country.
Adrienne Wikso said she has been surfing most of her life, but never believed she would be battling for her life against a shark.
In 2015, Chris Blowes was attacked by a great white shark. Now, more than five years later, he has finally won the right to keep the shark tooth left behind in his surfboard.
Brook Toussaint, a 26-year-old veterinary student, was swimming with several others off the Caribbean island of St. Kitts on January 9 when a tiger shark went for her.
Two people, a teenage girl and a man, have been bitten by sharks within three miles of each other, though their injuries are not life-threatening.
The nine-year-old boy was hospitalized and underwent surgery to treat his wound.
A father and son had to swim for over half an hour to reach safety after their vessel was repeatedly flipped over by a shark.
The man was rushed to hospital in critical condition where he underwent surgery.
Paramedics said it was a "remarkable" survival story.
The 17-year-old was trying to find his surfboard when the shark attacked him.
Andrew Sharpe was killed by a great white shark while surfing with friends on October 9.
Officials said the shark responsible for the attack was a six-foot-long oceanic whitetip.
"I look over, and I see a dorsal fin! I said 'oh man, that thing's coming right towards me,'" Erik "Marty" Martynuik said of his suspected shark encounter in waters off Emerald Isle, Carteret County.
The shocking footage shows the exact moment of the fatal encounter, with the large ocean predator caught on camera quickly grabbing the sea lion and thrashing its body from side-to-side.
The new "20/20" special chronicles Paige Winter's recovery after being attacked by a shark in 2019. It follows her through receiving a prosthetic leg, as well as important high school milestones.
The tooth measures around 1.8 inches long and 1.1 inches wide.
The man suffered severe injuries to his leg and paramedics were unable to save him.